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प्रश्न
Identify the following substance:
An alkaline gas A which gives dense white fumes with hydrogen chloride.
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उत्तर
Ammonia gas
संबंधित प्रश्न
Write down the formulae for the following compounds :
Calcium oxide
Give the formulae of the compounds formed from the following sets of elements :
- calcium and fluorine
- hydrogen and sulphur
- nitrogen and hydrogen
- carbon and chlorine
- sodium and oxygen
- carbon and oxygen
Define ‘formula unit’ of an ionic compound. What is the formula unit of (i) sodium chloride, and
(ii) magnesium chloride ?
What is a chemical formula? What is the significance of a formula?give an example to illustrate?
Name the element in the compound and give the formula of the following compound:
Acetic acid
Write the formula of the following compound:
Potassium dichromate
Write the formula of the following compound:
Potassium permanganate
Write the formula of the following compound:
Potassium plumbite
Write the formula of the following compound:
Potassium bisulphite
Write the formula of the following compound:
Sodium bisulphate
Write the formula of the following compound:
Sodium sulphite
Write the formula of the following compound:
Sodium iodide
Write the formula of the following compound:
Copper [II] oxide
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
NaO
Write the chemical formula for the following elements.
- Hydrogen
- Nitrogen
- Ozone
- Sulphur
Which of the following represents a correct chemical formula? Name it.
BiPO4
Write the molecular formulae for the following compounds
Copper (II) bromide
What is a chemical formula?
Play a game for writing formula.
Example 1: Make placards with symbols and valencies of the elements separately. Each student should hold two placards, one with the symbol in the right hand and the other with the valency in the left hand. Keeping the symbols in place, students should criss-cross their valencies to form the formula of a compound.
